/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/ModelingEditorUI/Public/ModelingWidgets/SDraggableBox.h
A drag/drop operation used bySDraggableBox, largely modeled onFInViewportUIDragOperation, except instead of requiring the drop location to be able to handle that particular class to trigger the OnDragComplete delegate, it just triggers on any drop. This makes it possible to use it in any viewports, not just the level editor.
class FDraggableBoxUIDragOperation : public [FDragDropOperation](API\Runtime\SlateCore\Input\FDragDropOperation)
FVector2D
DecoratorOffsetFromCursor
Screen space offset of grab location from the top left corner of the rectangle being dragged.
FVector2D
LastContentSize
Size of rectangle being dragged.
SDraggableBox::...
OnDragComplete
TSharedPtr< cla...
UIBeingDragged
Shared pointer to our contents, which are a weak pointer.